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Finding the Fourth Proportional to 77,879.54, 107,471.21 and 49,214.52

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Solution

The fourth proportional to 77,879.54, 107,471.21 and 49,214.52 is: 67,914.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,879.54 : 107,471.21 = 49,214.52 : x
  2. Step 2: Convert to fraction form
    77,879.54/107,471.21 = 49,214.52/x
  3. Step 3: Cross multiply
    77,879.54x = 107,471.21 × 49,214.52
  4. Step 4: Simplify right side
    77,879.54x = 5,289,143,767.90
  5. Step 5: Solve for x
    x = 5,289,143,767.90/77,879.54
  6. Step 6: Final answer
    x = 67,914.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.